Many people actually think that ground water runs in underground rivers. This is not true. Ground water is water that fills all the space in the soil like a sponge.
Each type of soil--clay, loam, silt, sand, or rock has different amounts of space between the grains. Sometimes water can move fast through the soil like in sand, other times it is slowed down by thick soils like clay. Fast ground water movement may be a mile per day. Slow ground water might move less than one millimeter per day. What kind of soil is near your house?
To go back to the quiz and learn more, click HERE.